# FLUX.1 SRPO [dev]

> Image AI Model by Black Forest Labs — available on Layer

12B flow transformer fine-tuned with SRPO for exceptional photorealism and polished composition.

FLUX.1 SRPO [dev] is a 12-billion-parameter flow transformer fine-tuned by Tencent using Semantic Relative Preference Optimization (SRPO). This advanced technique directly aligns the model with human preferences for realism and aesthetics, significantly reducing the typical 'AI look.' It's an ideal choice for artists and creators in the AI art community seeking exceptional photorealism, fine details, and visually appealing compositions.

## Specifications

| Property | Value |
|----------|-------|
| Provider | Black Forest Labs |
| Category | Image |
| Price | 0.75 / megapixel, minimum 0.75 per run |
| Aspect Ratios | 1:1, 2:3, 3:4, 9:16, 3:2, 4:3, 16:9 |

## Frequently Asked Questions

### How much does FLUX.1 SRPO [dev] cost? Is it free?

Generating assets on Layer requires using Creative Units. This model's current price is 0.75 / megapixel, minimum 0.75 per run.

### How does Layer's pricing work?

There are no seat fees, feature gates, or plans on Layer. Instead, our platform uses a consumption based system with Creative Units (CUs) with a flexible monthly subscription. Every generation on Layer (image, video, 3D, or audio) consumes a Creative Unit, and you only pay for what you create.

### What Elo score does FLUX.1 SRPO [dev] have?

FLUX.1 SRPO [dev] has an Artificial Analysis Arena Elo of 826, which places it #54 of the 56 scored image models on Layer. GPT Image 2.5 Sunburst leads that ranking with an Elo of 1222.

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